<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .p .c {
            color: red;
        }
    </style>
</head>
<body>
<div class="p">
    <div class="c">
        aaaa
    </div>
    <div>
        bbb
        <div class="c">
            cccc
        </div>
    </div>
</div>
</body>
</html>